The most common and most likely answer to this crossword clue is the 6 letter word DROOPY
I've seen this crossword clue in Independent
D
R
O
O
P
Y
More clues leading to the result DROOPY
- Back yard fencing weak and sagging
- Somewhat shabby, poor design seen from the back is sagging
- Falling down like an idiot, circling right round
- Doctor on rounds, plainly exhausted and sagging
- Feeling tired and thirsty having wrapped stool up
- Sagging with exhaustion because of poor return in a lost day
- It’s boring ’olding ’oop slack
- Bad day up, year looking tired
- Declining money poor director hoards in retirement
- Flagging without resources, travelling north through Benin
Buddy explains!

The straight part
We know that "Feeling tired" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case feeling tired = droopy.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does DROOPY mean?
DROOPY adjective- Tending to droop; sagging; wilting.